The Dewalt DCB548 is an XR FLEXVOLT series 18v/54v convertible battery pack. The DCB548 has an incredible 12Ah/4Ah capacity. Ideal for high demand/high powered applications with the Dewalt XR FLEXVOLT power tools. A 54V Battery that has unprecedented levels of power, finally giving you the power you need from a cordless tool. That's not all though - it can switch itself to 18v so it is compatible with your existing 18v XR power tools offering extended runtime meaning you don't need to replace your existing kit - not even your 18v XR charger, as these batteries are compatible! This battery has the same size and weight as DCB547 9Ah XR FLEXVOLT battery. 12Ah XR FLEXVOLT Battery. Voltage steps up to 54V to deliver unprecedented power. 22mm high capacity battery cells delivering 216Wh of energy for longer runtime without increasing the size and weight (125mm x 85mm x 90mm, 1.2Kg). Compatible with all 18V XR and 54V XR FLEXVOLT tools and all 18V XR chargers - one battery for multi